The Hyperion Omnibus: Hyperion, The Fall of Hyperion by Dan Simmons
The Hyperion books are credited with single-handedly reinventing and reinvigorating SF in the 1990s. A broad canvased, hugely imaginative and exciting SF epic, the books draw on the works of Keats and provide a uniquely intelligent and literary approach with cutting edge science, compelling characterisation and edge-of-your-seat excitement.
The story is continued in ENDYMION and THE RISE OF ENDYMION, which Gollancz will also be publishing in an omnibus volume.